Improvement in plow-points



UNITED STATES PATENT OFFICE EDWARD C. GERO AND JAMES N. COOLEY, OFKALAMAZOO, MICHIGAN.

IMPROVEMENT IN PLOW-POIN'TS.

Specification forming part of Letters Patent No. 87,454, dated March 2,1869.

To all whom 'it may concern:

Be it known that we, EDWARD (l. GERO and JAMES N. COOLEY, in the countyand town of Kalamazoo, and State of Michigan, have invented a certainnew and useful-Improvement in a Socket or an Adjustable SteelPlow-Point; and the following is a full,clear, and exact description ofthe same, reference being had to the accompanying drawings, making apart of this specification, in which- Figure l represents a cast-ironplow-point with the steel socket-point fitted and secured in its place.Fig. 2 shows a top perspective view of the steel socket-point. Fig. 3 isan under-side view of the same. Fig. 4 shows an ordinary cast-ironplow-point.

The object of our invention is to economize time, labor, and expense inkeepin gplow-points sharp and the plow in good Working order; and ourinvention consists in the construction and mode of securing steelsockets to plowpoints, so that they may be highly tempered, easilysharpened when they becomeworn and dull, taken oft' and laid with steeland replaced, thus saving at least one hundred per cent. in

' the cost.

To enable others to make and use our invention we will describe it morein detail, referring to the drawings, and to the letters marked thereon.

To the ordinary cast-iron plow-point A or share we form and :fit a noseor point, B, which should be made out of the best quality of caststeel,it having a socket, C, to iitthe iron point a of the share A, the socketbeing provided with an opening, b, on the under side, so as to allow.the thin portion of the metal to yield or spring enough to clasp thepoint sufficiently tight to hold it on, the force being applied in thedirection to press it on harder When in operation, so that no other modeof fastening is absolutely necessary. If desired, the socketpoint B maybe secured to the share by a pin, screw, or bolt; but in our experienceand the thorough practical test that has been made by numerous farmersin our vicinity this season, no other fastening but the spring or theclasping power of the metal ofthe thinner portions of the socket isrequired.

The great merits of our simple invention, as will readily be seen, liein the utility. .The socket steel point B may be made and furnished ataboutoneh alf the cost of the chilled cast-iron plow-points, and will dothree times as much plowing without getting dull, when it can easily betaken oft' and sharpened and tempered by a common blacksmith, at atrifling cost,lthree or four times, before it is too much reduced, andthen it can be laid with steel and be susceptible of another series ofwear' and sharpenings, as before described, thus effectin g a saving ofthree or four hundred per cent. in the cost and wear of plow-points.

What we claim as our invention, and desire to secure by Letters Patent,is

A steel socket plow-point constructed in the mannerdescribed,.the samebeing secured to and in combination with a cast-iron plow point orshare, substantially as herein set forth.

In testimony whereof we hereunto subscribe FRANK C. Gnnvms.

